A sugar cube was placed into a beaker containing 100 mL of water at room temperature and completely dissolved into the water. This process is represented by the series of diagrams labeled A, B, and C below. Describe one way that the dissolved sugar at C could be separated from the water.

Answer:

0.5875L

Explanation:

concentration = mole/ volume

n(LiCl) = 20 / (7 + 35.5) = 0.47 mol

volume = mole / conc.

volume = 0.47 /0.8

= 0.5875 dm³ = 0.5875L

The partial pressure of Xe in the mixture is 1.850 atm. (partial pressure of Xe = Total pressure - Partial pressure of He - Partial pressure of Ar = 1.850 atm).

To find the partial pressure of Xe, we need to subtract the partial pressures of He and Ar from the total pressure.

Total pressure = partial pressure of He + partial pressure of Ar + partial pressure of Xe

Given:

Total pressure = 2.40 atm

Partial pressure of He = 0.300 atm

Partial pressure of Ar = 0.250 atm

Let's solve for the partial pressure of Xe:

Partial pressure of Xe = Total pressure - Partial pressure of He - Partial pressure of Ar

Partial pressure of Xe = 2.40 atm - 0.300 atm - 0.250 atm

Partial pressure of Xe = 1.850 atm

Therefore, the partial pressure of Xe in the mixture is 1.850 atm.

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Answer: yes they come in different colors.

Explanation:

Most shades of soil is mostly black,brown,red,gray,and white the color of soil and other properties including texture, structure, and consistency are used to distinguish and identify soil.

Answer:

D

Explanation:

D is the answer because 2 is needed to know

Answer:

B) 3 and 7

Explanation:

i just took the test

Answer:

[tex]28.037\ \text{s}[/tex]

Explanation:

[tex][A]_0[/tex] = Initial concentration = 1.28 M

[tex][A][/tex] = Final concentration = [tex]0.17[A]_0[/tex]

k = Rate constant = 0.0632 s

t = Time taken

For first order reaction we have the relation

[tex]kt=\ln\dfrac{[A]_0}{[A]}\\\Rightarrow t=\dfrac{\ln\dfrac{[A]_0}{[A]}}{k}\\\Rightarrow t=\dfrac{\ln\dfrac{[A]_0}{0.17[A]_0}}{0.0632}\\\Rightarrow t=28.037\ \text{s}[/tex]

Time taken to reach the required concentration would be [tex]28.037\ \text{s}[/tex].

Answer:

1.19 is the answer

Explanation:

Answer: (a) Mole fraction of [tex]H_{2}[/tex] is 0.66.

Mole fraction of [tex]N_{2}[/tex] is 0.33

(b) The partial pressure of [tex]H_{2}[/tex] is 1.98 atm.

The partial pressure of [tex]N_{2}[/tex] is 0.99 atm.

(c) The total pressure is 3.0 atm

Explanation:

Given: Volume = [tex]22.4 dm^{3}[/tex]  (1 [tex]dm^{3}[/tex] = 1 L) = 22.4 L

Moles of [tex]H_{2}[/tex] = 2.0 mol

Moles of [tex]N_{2}[/tex] = 1.0 mol

Total moles = (2.0 + 1.0) mol = 3.0 mol

Temperature = 273.15 K

[tex]PV = nRT\\[/tex]

where,

P = pressure

V = volume

n = number of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

[tex]PV = nRT\\P \times 22.4 L = 3.0 mol \times 0.0821 L atm/mol K \times 273.15 K\\P = 3.0 atm[/tex]

The mole fraction of [tex]H_{2}[/tex] is calculated as follows.

[tex]Mole fraction = \frac{moles of H_{2}}{moles of H_{2} + moles of N_{2}}\\= \frac{2.0 mol}{(2.0 + 1.0) mol}\\= 0.66[/tex]

The mole fraction of [tex]N_{2}[/tex] is as follows.

[tex]Mole fraction = \frac{moles of N_{2}}{moles of H_{2} + moles of N_{2}}\\= \frac{1.0 mol}{(2.0 + 1.0) mol}\\= 0.33[/tex]

Partial pressure of [tex]H_{2}[/tex] are as follows.

[tex]P_{H_{2}} = P_{total} \times mole fraction of H_{2}\\= 3.0 atm \times 0.66\\= 1.98 atm[/tex]

Partial pressure of [tex]N_{2}[/tex] are as follows.

[tex]P_{N_{2}} = P_{total} \times mola fraction of N_{2}\\= 3.0 atm \times 0.33\\= 0.99 atm[/tex]

Answer:

Gymnosperm and Angiosperms both are plant groups but Gymnosperm is just very large leaves that come out of the ground and Angiosperms have flowers. Gymnosperm produce seeds in pine cones for example. Some plants in the Gymnosperm group of plants are pines. They produce naked seeds which means that they aren't protected by a ovary (Fruit like an apple) to help them get planted. Angiosperms have seeds that come out of their flowers and are called covered seeds. When the plant is about to die, it's seeds fall out and either float away and grow later of fall where the plant is. Also, insects carry them places too.

Hope this helps.

Answer:

hi

Explanation:

I'm just figuring this out

Answer: prism

Explanation: A prism is a polyhedron, with two parallel faces called bases. The other faces are always parallelograms. The prism is named by the shape of its base.

Answer:

Age ≅ 7500 years

Explanation:

All radioactive decay is 1st order kinetics and described by the expression

A = A₀e^-kt => t = ln(A/A₀) / -k

k = 0.693 / t(half life) = (0.693 / 5730)yrs⁻¹ = 1.21 x 10⁻⁴ yrs⁻¹

t = Age = [ln(0.103/0.255) / - 1.21 x 10⁻⁴] yrs = 7500 years

Answer:

a < c < b < d

Explanation:

The weak acid with the lowest pKa will be the most acidic. In the other way, the conjugate base which the acid is weakest will be strongest.  

The weak base with the lowest pKb will be the most basic. And the conjugate base of the weakest base will be a strongest acid.

Using the values:

Ka HCN = 4.9x10⁻¹⁰

Kb HONH2 = 1.1x10⁻⁸

Ka HClA 3.0x10⁻⁸

Kb C2H5NH2 = 6.4x10⁻⁴

The NaNO3 is the conjugate base of a strong acid as HNO3. That means its solutions are almost neutral

The HONH3Br is the conjugate acid of a weak base. Its solutions will be acidics

C2H5NH3Cl is the conjugate acid of a weak base as ethylamine, its solutions will be acidic.

As ethylamine has a lower pkb than hydroxylamine, the conjugate acid of hydroxylamine will be more acidic.

NaF is the conjugate base of a weak acid as HF. Its solutions will be basics

The order in increasing pH is:

HONH3Br < C2H5NH3Cl < NaNO3 < NaF

Answer: I'm not sure what your question is but i'll answer as best as I can.

Explanation:

Since X is equal to 7 H and we know that H is equal to 1.008, we can just do 7x1.008 = 7.056 g. I hope i helped and please clarify more in the future.

The atomic mass of an element is given by the sum of the mass of protons and neutrons. The element X is lithium as it has a mass of 6.941 u.

Atomic mass is the sum of the masses of the isotopes of that element and is given by adding the masses of the number of protons and neutrons of the elemental atom.

The atomic mass of one hydrogen atom is 1.008, so seven hydrogens will be, 7 x 1.008 = 7.056 g. Now, from the periodic table, it can be seen that an atomic mass of 7.056 g is closest to the atomic mass of a lithium atom (6.941 u).

From the mass, it can be said that seven hydrogen atom has an equivalent mass as that of one lithium atom in the periodic table. The lithium atom has atomic number 3 and an atomic mass of 6.941 g/mol.

Therefore, element X is lithium.

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Answer:

False

Explanation:

Answer:

[tex]{\huge\blue{\fbox{{࿐ᑕᗩᖇᗷOᑎᗩTᗴ IOᑎ࿐}}}}[/tex]

✏The fizz in the club soda, the foaming effect in the washing soda are all due to carbonate ions. Carbonate is a salt of carbonic acid possessing the molecular formula CO32–. The main group of elements used as carbonates are alkali and alkaline earth metals.

✏ [tex]CO3 ^{2 - } [/tex]

ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

Answer:

10 molecules of NH₃.

Explanation:

N₂ + 3H₂ --> 2NH₃

As the N₂ supply is unlimited, what we need to do to solve this problem is convert molecules of H₂ into molecules of NH₃. To do so we use the stoichiometric coefficients of the balanced reaction:

10 NH₃ molecules could be prepared from 15 molecules of H₂ and unlimited N₂.  

Answer:

0.2878 liters

Explanation:

It is possible to make 0.2878 liters of 4 M solution of lithium bromide using 100 grams of the compound.

Answer:

λ Represents:-

-TheUnknownScientist

Answer:

According to the kinetic molecular theory of gases, the average speed and kinetic energy of gas molecules would INCREASE.

Explanation:

In the kinetic molecular theory of gases, assumptions were made based on macroscopic properties of gas (pressure, volume and temperature) which are as a result of the microscopic properties like the position and the speed of the gas molecules. The kinetic molecular theory explains the behaviour of gases through the following 5 assumptions made about an ideal gas;

--> Molecules of a gas are in constant and rapid motion in straight lines until they collide with one another and with the walls of their containers.

--> The actual volume occupied by the had is negligible compared with the volume of the container.

--> Forces of attraction or repulsion between the molecules of a gas are negligible

--> The collision between the molecules is perfectly elastic.

--> The average kinetic energy of the gas molecules is proportional to the temperature of the gas.

Because gas molecules are in constant motion, it has kinetic energy which can be altered when there is increase in pressure. An increase in pressure will cause gas molecules to collide more frequently with one another. This in turn leads to increase in average speed and the kinetic energy of the individual molecules.

Answer:

P-block

Explanation:

Chlorine

Atomic number (Z) 17

Group group 17 (halogens)

Period period 3

Block p-block

Answer:

What does "in which block does chlorine lies"? That question has no way to answer it because there is no question content lol

Explanation:

Answer:

The answer is in the problem

Explanation:

As general rule of number of oxygen is -2:

O → -2

Alkali metals (Li, Na, K) are always +1

Na → +1

Alkali earth methals (Be, Mg, Ca...) are always +2

Ca → +2

The halogen group (F, Cl, Br...) is always -1

F → -1

The oxidation number of Si (+/- 4)

Aluminium is, usually +3

And to complete the octet rule in nitrogen, 3 electrons are required. That means:

N → -3

Answer:

Venus

Explanation:

Similar in structure and size to Earth, Venus spins slowly in the opposite direction from most planets. Its thick atmosphere traps heat in a runaway greenhouse effect, making it the hottest planet in our solar system with surface temperatures hot enough to melt lead.

Answer:

Venus

Explanation:

Hope helps

Explanation:

Nuclear power plants deliver electricity 24 hours a day, 7 days a week, irrespective of weather and seasons. As well as reducing greenhouse gas emissions, nuclear generation helps reduce air pollution

Answer:

D

Explanation:

Just did the test

Answer:

6.502 x 10²⁴ atoms.

Explanation:

First we convert 158.4 g of CO₂ into moles, using carbon dioxide's molar mass:

Then we calculate how many CO₂ molecules are there in 3.6 moles, using Avogadro's number:

As there are 3 atoms per CO₂ molecule, we triple the number of CO₂ molecules in order to get the answer:

The closest answer is the third option,  6.502 x 10²⁴ atoms.

Answer:  dispersion forces, dipole-dipole and hydrogen bonds

Explanation:

Explanation:

because there is 2 hydrogen atoms in the reactions side of the equation (you can tell because the H has a 2 in the subscript) you have to have 2 hydrogen atoms in the reactants side to help balance out the equation. and since the copper and oxygen atoms are already balanced there is no coefficient needed.

FeCl2 + Na2CO3 = FeCO3 + 2NaCl